Programmable controller having directly executable CPU instructions

A programmable controller operative in response to a sequence program, which comprises a plurality of PC instructions that may be represented in a ladder language, comprising:

• means for storing at least one assembler language instruction having a function equivalent to a macro program;
• means for converting each of said sequence program PC instruction into restoration information which can restored to said ladder language and for generating a restoration information file;
• means for converting said restoration information stored in said restoration information file into CPU instructions for a CPU which can execute said PC instructions and generating an execution file, wherein a PC instruction which requires use of the function equivalent to the macro program for its execution is converted to a unit of CPU instructions including information related to the function equivalent to the macro program so that the CPU instructions can be executed without reference to the macro program;
• memory means for storing said restoration information file and said execution file;
• restoration information control means for reading and executing CPU instructions from said execution file of said memory means when the sequence program is executed, and restoring the restoration information read from said restoration information file of the memory to the ladder language;
• and
• means responsive to said restoration information control means for displaying the sequence program as a ladder diagram.

A programmable controller (PC), operative in response to a sequence program, comprising a series of PC instructions, which may be represented in an original language and may be executed as CPU instructions, comprising:

• means for storing at least one assembler language instruction having a function equivalent to a macro program;
• means for converting said PC instructions into said CPU instructions and into restoration information, said restoration information being restorable to said original language, wherein a PC instruction which requires use of the function equivalent to the macro Program for its execution is converted to a unit of CPU instructions including information related to the function equivalent to the macro program so that the CPU instructions can be executed without reference to the macro program;
• restoration information memory means for storing said restoration information as a restoration file;
• execution memory means for storing execution information, comprising said CPU instructions, as an execution file;
• means for converting said restoration information stored in said restoration information memory into CPU instructions for a CPU which can execute said PC instructions and for generating an execution file, said converting means being operative to delete said restoration information file and to store said execution file;
• and
• wherein said CPU instructions are read from said execution file of said execution memory means and executed when the sequence program is executed.

The method of operating a programmable controller (PC) in response to a sequence program having a plurality of PC instructions composed of basic instructions and functional instructions, said PC being operative to display said PC instructions in ladder form, comprising:

• a. converting said PC instructions into CPU instructions in assembler language and into restoration information in assembler language, said restoration information being changeable to a format for displaying said sequence program in ladder form wherein a PC instruction which requires use of a function equivalent to a macro program for its execution is converted to a unit of CPU instructions so as to include information related to the function equivalent to the macro program so that the CPU instructions can be executed without reference to the macro program;
• b. storing said CPU instructions along with said restoration information in an assembler language file;
• c. compiling said assembler language file into a machine language;
• d. storing said machine language in an execution file;
• and
• e. accessing said execution file for at least one of
• 1. executing said sequence program in accordance with the machine language converted from said assembler language;
• and
• 2. displaying said sequence program by restoring said restoration information to the ladder language.